Home and Away reveals mysterious new storyline for Justin Morgan

"This note will change the course of so many lives."

Home and Away has revealed a mysterious new storyline for Justin Morgan, which is set to air on Australian screens next week.

In a new promo video posted to the soap's official Instagram page, it was revealed that a note put in Justin's bag by a mysterious young boy "will change the course of so many lives."

Justin soon discovers the note – which appears to have been written by a child – and is taken aback by what he reads: "Pleese help. Need food. I live in the house with the blu letta box."

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We then watch as Justin heads over to the house with the blue letterbox and knocks on the door, before he looks through the window and notices a young boy collapsed on the floor.

At the hospital, Justin tries to persuade the youngster to tell him who he is and what happened to him, but he refuses, prompting Justin to tell Cash: "It's like he's been told to keep his mouth shut."

Justin is then told that the boy is "severely dehydrated and undernourished", to which he says to Leah: "Something is seriously wrong here."

It remains unclear who the youngster is or what happened to him, but several fans have come up with their own theories in the post's comment section.

Some believe that the boy could either a long-lost son or brother of Justin's, while another commented: "Justin will probably adopt or foster him."

Home and Away fans in the UK will see these scenes on Channel 5 in June.

Australian viewers recently saw the conclusion to Justin's court drama, where he was eventually handed a sentence of 500 hours of community service. Justin had faced the possibility of jail time over an attack on a stranger.